Refrigeration appliance, and method for the production of a refrigeration appliance

Abstract

A refrigeration appliance includes a refrigerating space, a light-guiding layer, and a multi-layered part having a photocatalytic cover layer on a side facing the refrigerating space. The photocatalytic cover layer is applied to the light-guiding layer which enables light to be ducted to the photocatalytic cover layer.

The invention claimed is: 
     
       1. A refrigeration appliance, comprising:
 a refrigerating space; 
 an inner wall at least partially delimiting the refrigerating space, the inner wall including a light-guiding layer and a photocatalytic cover layer applied to the light-guiding layer, the photocatalytic cover layer having a side exposed to the refrigerating space, 
 wherein the light-guiding layer is configured to duct light to the photocatalytic cover layer. 
 
     
     
       2. The refrigeration appliance of  claim 1 , constructed in the form of a domestic refrigeration appliance. 
     
     
       3. The refrigeration appliance of  claim 1 , further comprising an intermediate layer made of an inert material and provided between the photocatalytic cover layer and the light-guiding layer. 
     
     
       4. The refrigeration appliance of  claim 1 , wherein the light-guiding layer has a layer thickness of 1 to 6 mm. 
     
     
       5. The refrigeration appliance of  claim 1 , wherein the photocatalytic cover layer has a layer thickness of less than 1 mm. 
     
     
       6. The refrigeration appliance of  claim 1 , wherein the light-guiding layer and the photocatalytic cover layer are formed of the same basic material. 
     
     
       7. The refrigeration appliance of  claim 1 , wherein the inner wall is a molded part. 
     
     
       8. The refrigeration appliance of  claim 7 , further comprising an additional support layer, wherein the light-guiding layer is applied to the additional support layer, thereby forming a three-layer structure of the molded part. 
     
     
       9. The refrigeration appliance of  claim 8 , wherein the three-layer structure is produced by coextrusion. 
     
     
       10. The refrigeration appliance of  claim 8 , wherein the additional support layer in the three-layer structure of the molded part is a polystyrene, SAN, or ABS. 
     
     
       11. The refrigeration appliance of  claim 8 , wherein the additional support layer has a layer thickness of 3 to 6 mm. 
     
     
       12. The refrigeration appliance of  claim 1 , wherein the light-guiding layer is made from a material configured to be deep-drawn. 
     
     
       13. The refrigeration appliance of  claim 12 , wherein the light-guiding layer is made from polystyrene or SAN. 
     
     
       14. The refrigeration appliance of  claim 1 , wherein the light-guiding layer and the photocatalytic cover layer together form a two-layer structure, with the light-guiding layer being embodied as a support layer of the two-layer structure. 
     
     
       15. The refrigeration appliance of  claim 14 , wherein the two-layer structure is produced by coextrusion. 
     
     
       16. The refrigeration appliance of  claim 1 , wherein the photocatalytic cover layer has a photoactive material incorporated into a basic material. 
     
     
       17. The refrigeration appliance of  claim 16 , wherein the photoactive material is TiO 2 . 
     
     
       18. The refrigeration appliance of  claim 16 , wherein the basic material is polystyrene. 
     
     
       19. The refrigeration appliance of  claim 16 , wherein the basic material is configured to be deep-drawn. 
     
     
       20. A method of forming an inner wall of a refrigeration appliance, comprising:
 providing a light-guiding layer; 
 applying a photocatalytic cover layer on the light-guiding layer, the photocatalytic cover layer being configured to be exposed to a refrigerating space of the refrigeration appliance, 
 wherein the light-guiding layer is configured to duct light to the photocatalytic cover layer. 
 
     
     
       21. The method of  claim 20 , wherein the photocatalytic cover layer is applied to the light-guiding layer after the light-guiding layer has been shaped. 
     
     
       22. The method of  claim 20 , wherein the light-guiding layer is made from polystyrene or SAN. 
     
     
       23. The method of  claim 20 , further comprising providing an intermediate layer made of an inert material between the photocatalytic cover layer and the light-guiding layer. 
     
     
       24. The method of  claim 20 , wherein the light-guiding layer has a layer thickness of 1 to 6 mm. 
     
     
       25. The method of  claim 20 , wherein the photocatalytic cover layer has a layer thickness of less than 1 mm. 
     
     
       26. The method of  claim 20 , wherein the basic material is adapted to being deep-drawn. 
     
     
       27. The method of  claim 20 , wherein the light-guiding layer and the photocatalytic cover layer are formed of the same basic material. 
     
     
       28. The method of  claim 20 , wherein the applying step including coating the photocatalytic cover layer onto the light-guiding layer by extrusion at a first production step before the light-guiding layer and the photocatalytic cover layer are shaped. 
     
     
       29. The method of  claim 28 , wherein the photocatalytic cover layer is coated onto the light-guiding layer by coextrusion. 
     
     
       30. The method of  claim 28 , further comprising deep-drawing the light-guiding layer and the photocatalytic layer to form a shaped molded part. 
     
     
       31. The method of  claim 28 , wherein the photocatalytic cover layer is coated onto a support layer at the first production step with the light-guiding layer being located in between, thereby forming a three-layer structure of a molded part. 
     
     
       32. The method of  claim 31 , wherein the three-layer structure is produced by coextrusion. 
     
     
       33. The method of  claim 31 , wherein the support layer in the three-layer structure of the molded part is a polystyrene, SAN, or ABS. 
     
     
       34. The method of  claim 31 , wherein the support layer has a layer thickness of 3 to 6 mm. 
     
     
       35. The method of  claim 20 , wherein the photocatalytic cover layer has a photoactive material incorporated into a basic material. 
     
     
       36. The method of  claim 35 , wherein the photoactive material is TiO 2 . 
     
     
       37. The method of  claim 35 , wherein the basic material is polystyrene. 
     
     
       38. A refrigeration appliance, particularly a domestic refrigeration appliance, having a multi-layered, particularly molded part which on its side facing the refrigeration appliance's refrigerating space has a photocatalytic cover layer, wherein the photocatalytic cover layer has been applied to a light-guiding layer via which light can be ducted to the photocatalytic cover layer, wherein the photocatalytic cover layer has a photoactive material, for example Ti0 2 , that is incorporated into a basic material, wherein the basic material of the photocatalytic cover layer as well as the light-guiding layer are capable of being deep-drawn, and wherein the basic material of the photocatalytic cover layer and the material of the light-guiding layer preferably belong to the same material families or are identical. 
     
     
       39. The refrigeration appliance as claimed in  claim 38 , wherein the light-guiding layer is made from polystyrene or SAN. 
     
     
       40. The refrigeration appliance as claimed in  claim 38 , wherein the light-guiding layer and photocatalytic cover layer together form a two-layer structure that is produced particularly by coextrusion and in which the light-guiding layer is embodied as a support layer of the molded part. 
     
     
       41. The refrigeration appliance as claimed in  claim 38 , wherein the case of the molded part the light-guiding layer has been applied to an additional support layer thereby forming a three-layer structure produced particularly by coextrusion. 
     
     
       42. The refrigeration appliance as claimed in  claim 41 , wherein the support layer in the three-layer structure of the molded part is a polystyrene, SAN, or ABS. 
     
     
       43. The refrigeration appliance as claimed  claim 38 , wherein an intermediate layer made of an inert material has been provided between the photocatalytic cover layer and light-guiding layer. 
     
     
       44. The refrigeration appliance as claimed  claim 38 , wherein the layer thickness (d 1  to d 4 ) of the light-guiding layer is 1 to 6 mm, of the additional support layer 3 to 6 mm, and/or of the photocatalytic cover layer less than 1 mm. 
     
     
       45. A method for producing a molded part for a refrigeration appliance as claimed in  claim 38 . 
     
     
       46. The method as claimed in  claim 45 , wherein the photocatalytic cover layer is coated onto the light-guiding layer by means of, for example, extrusion, particularly coextrusion, at a first production step (I) before the molded part is shaped in, for example, a deep-drawing process. 
     
     
       47. The method as claimed in  claim 45 , wherein the photocatalytic cover layer is coated onto the support layer at the first production step (I) with the light-guiding layer being located in between. 
     
     
       48. The method as claimed in  claim 45 , wherein the photocatalytic cover layer is applied to the light-guiding layer when the molded part has been shaped.